B$2.$ Design a $8$ m high square reinforced concrete column assuming that the member is subject to a lateral point load at mid$-$height in one direction of $20$ kN $($wind$)$ and the column must carry an axial live load of $300$ kN and an axial dead load of $400$ kN $.$ Assume the bottom the top are pinned. Use concrete with a capacity of $30$ MPa $,$ assume the column will be located inside a building.